Hard Drive is slow, keeps disappearing ('WARNING: a problem with the hard drive has been detected.')

[crazyfool123]

Hi!

I have a Win 7 PC with 4 hard drives (2 TB each).

On booting the machine, this is what happens:
1. The BIOS splashscreen loads for more than 3 mins
2. It shows this message:
"The following are warnings that were detected during this boot.
These can be viewed in setup on the Event Log Page.
WARNING: a problem with the hard drive has been detected."
3. The 'Starting Windows (c) Microsoft' screen takes more than 5 mins

One of the hard disks, mapped to one 2 TB drive (which has 1.4 TB of useful data) does not show up in My Computer most of the times I start the machine. It does show up sometimes (around 1 in 15 boots).

Even when it is visible and I try to copy it to an external usb drive, the copy is very slow (around 1 mbps) and after a few minutes, I randomly get all types of errors: I/O device, the resource was not found, etc or the 'copying...' simply disappears. The drive then disappears from My Computer.

What could be the issue? Of course my first priority is to copy the data. I have copied only around 200 GB in a week so far.

Thanks!

 

[ailos]

Try unplugging the hard drives without the OS, Once you've gotten into windows open cmd as administrator and type "chkdsk /r /f" And see if that helps